Table 2.
Ovarian stimulation characteristics among the three groups.
| Item | Group 1 | Group 2 | Group 3 | P |
|---|---|---|---|---|
| No. of cases | 238 | 474 | 236 | |
| Protocol (%) | 0.078 | |||
| GnRH agonist protocol | 83.2 (198/236) | 86.5 (410/474) | 90.3 (213/236) | |
| GnRH antagonist protocol | 16.8 (40/236) | 13.5 (64/474) | 9.7 (13/236) | |
| Starting dosage of Gn (IU) | 122.1 ± 27.7 | 131.9 ± 29.2 | 142.9 ± 31.7 | <0.001 |
| Total dosage of Gn (IU) | 1,741.4 ± 87.6 | 2,200.8 ± 1,202.6 | 2,880.0 ± 1,254.2 | <0.001 |
| Duration of Gn (d) | 11.2 ± 3.2 | 12.2 ± 3.7 | 13.7 ± 3.7 | <0.001 |
| No. of oocytes retrieved | 16.0 ± 7.7 | 14.8 ± 7.9 | 13.8 ± 7.8 | 0.011 |
| No. of mature oocytes | 13.6 ± 7.0 | 12.7 ± 7.1 | 11.8 ± 6.8 | 0.017 |
| No. of normal fertilization oocytes | 9.6 ± 5.6 | 9.0 ± 5.5 | 8.1 ± 5.2 | 0.009 |
| No. of available embryos | 7.7 ± 4.8 | 7.6 ± 5.0 | 6.7 ± 4.5 | 0.048 |
| No. of good embryos | 4.1 ± 2.5 | 3.8 ± 2.4 | 3.6 ± 2.1 | 0.036 |